lib/encoding+math tests: hand-main plumbing -> assert (@test conversion B2)

lib/math/random/random_test.ww

@@ -4,11 +4,11 @@ import random;
 
 @test fn seq() void = {
 	let r: random.random = random.init(1234567u64);
-	if (random.next(&r) != 6457827717110365317u64)  { let _: i32 = 1/0; };
-	if (random.next(&r) != 3203168211198807973u64)  { let _: i32 = 1/0; };
-	if (random.next(&r) != 9817491932198370423u64)  { let _: i32 = 1/0; };
-	if (random.next(&r) != 4593380528125082431u64)  { let _: i32 = 1/0; };
-	if (random.next(&r) != 16408922859458223821u64) { let _: i32 = 1/0; };
+	assert(!(random.next(&r) != 6457827717110365317u64));
+	assert(!(random.next(&r) != 3203168211198807973u64));
+	assert(!(random.next(&r) != 9817491932198370423u64));
+	assert(!(random.next(&r) != 4593380528125082431u64));
+	assert(!(random.next(&r) != 16408922859458223821u64));
 };
 
 @test fn deterministic() void = {
@@ -16,7 +16,7 @@ import random;
 	let b: random.random = random.init(42u64);
 	let i: i32 = 0;
 	for (i < 32) {
-		if (random.next(&a) != random.next(&b)) { let _: i32 = 1/0; };
+		assert(!(random.next(&a) != random.next(&b)));
 		i += 1;
 	};
 };
@@ -28,7 +28,7 @@ import random;
 		let v: u32 = random.u32n(&r, 17u32);
 		// v stored as u64 with possible high bits — mask before compare.
 		let vv: u64 = (v: u64) & 0xFFFFFFFFu64;
-		if (vv >= 17u64) { let _: i32 = 1/0; };
+		assert(!(vv >= 17u64));
 		i += 1;
 	};
 };
@@ -38,7 +38,7 @@ import random;
 	let i: i32 = 0;
 	for (i < 200) {
 		let v: u64 = random.u64n(&r, 16u64);
-		if (v >= 16u64) { let _: i32 = 1/0; };
+		assert(!(v >= 16u64));
 		i += 1;
 	};
 };
@@ -48,7 +48,7 @@ import random;
 	let i: i32 = 0;
 	for (i < 200) {
 		let v: u64 = random.u64n(&r, 100u64);
-		if (v >= 100u64) { let _: i32 = 1/0; };
+		assert(!(v >= 100u64));
 		i += 1;
 	};
 };